If the NFL really cared about the fan experience they would offer all the games for free...the NFL is a business and at the end of the day they want to make as much money as possible.
If anyone offered them more money than DAZN, they would have sold the rights to them - even if they couldn't deliver the product or had no platform or experience.
On the list of NFL's problems, I think DAZN and the Canadian market are well below anthem protests, teams moving, officiating controversies, players breaking the law (drugs, beating women/kids, etc), concussions, etc etc.